Weak Mixing Angle

The electroweak mixing angle that sets how much of the photon is in the Z boson, and vice versa.

Specifications & Metrics

symbol

θW

status

Measured — CODATA 2022 adjustment

value

0.22305 ± 2.3 × 10⁻⁴

Relative Scale in Constants

Core Principles & Analysis

• Sin²θW ≈ 0.231 — nature's mix of the electromagnetic and weak forces.
• Its value fixes the relative strengths of weak neutral and charged currents.
• Precision measurements at every energy probe for deviations beyond the Standard Model.